Statistics Chapter 3 Long Questions

A soft-drink bottling company fills and ships soda in plastic bottles with a target volume of 354 milliliters. The filling machinery does not deliver a perfectly consistent volume of liquid to each bottle, and the three quartiles for the fill volume are Q1 = 352, Q2 = 356, and Q3 = 357.A fill volume of 346 mL is considered low. Would a fill volume of 346 mL be considered an outlier?

No

The ________________ is the average of the squares of the distance each value is from the mean.

variance

If a distribution is negatively skewed as shown in the figure below, the mean will fall to the right of the median and the mode will fall to the left of the median.

False

The variance of a data set is the square root of the standard deviation.

False

A weighted mean is used when the values of the data set are not all equally represented.

True

The median can be a more appropriate measure of central tendency if the distribution of the data is extremely skewed.

True

The percentile corresponding to a given data value X is computed by adding the to number of values less than X then dividing by the total number of values in the data set.

True

The range of a data set is the difference between the highest value and the lowest value.

True

A ________________ is the midpoint in a data array.

median

The ________________ is the mode for grouped data.

modal class